Electrical warp stop motion



Dec. 8, 1931 c. E. BUOTE v ELECTRICAL WARP STOP MOTION Filed July 24, 1950 Hill J/Y/l/EA/ TUE CL A FrE/VCE 5552/0 77:

A FOP/"v5 Y5 Patented Dec. 8, 1931 UNITED STATES PATENT OFFICE CLARENCE E. BUOTE, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMPTON 8n KNOWLES LOOMI WORKS, -OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS ELECTRICAL WARP STOP MOTION Application filed. July 24,

This invention relates to improvements in electrical warp stop motions and it is the general object of the invention to provide an improved means for electrically connecting the live electrodes ofcontact bars for such motions.

In co-pending application Ser. No. 350,401

filed by Payne there is set forth a motion employing a contact bar having an outer grounded electrode which surrounds the greater part of and is insulated from the live electrode, being so formed as to expose a drop wire engaging surface of said live electrode. It is an important object of my present'invention to bend a portion of each of the live electrodes substantially at right angles to their length and have said bent ends of greater length than the distance between adjacent bars so that they may overlap and afford means for securing two wires together, the lead-in wire being connected to any of the bent ends to thereby energize all of the live electrodes.

It is a more particular object of my present invention to bend the ends so that the live electrodes may be aligned .in the assembled motion, said bent ends further having slots therein to receive securing means, such as small bolts, thereby permitting a slight variation in the spacing of the bars and obviating the possibility of a broken circuit due to improperly bent springs etc.

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings, wherein two forms of the invention are shown,

Fig. 1 is an end elevation of a warp stop motion made according to my present invention,

Fig. 2 is a top plan View of adjacent contact bars showing the manner of electrically connecting their live electrodes.

Fig. 3 is an enlarged end elevation of a portion of Fig. 1,

Fig. 4 is a perspective view of one end of a live electrode, and

Fig. 5 is a view similar to Fig. 2 showing a modified form of connection.

1930. Serial No. 470,361.

ing units 11 the right hand one of which as I shown in Fig. 1 receives'the thrustof a'nut 12 on the rod 10 and theleft hand one of which engages an end plate or member 13 held against a second nut 14 on the rod.

Electric contact bars 15. may be located be-' tween adjacent units 11 above the rod 10, while drop wire separator bars 16 may be located' belowsaid contact bar and held in position by spacing units.

Each contact bar. includes an outer inolos ing grounded electrode 17 having theupper and lower end bent thereof as at 18 and 19, respectively, to form retaining grooves for' the upper and lower edges of the live electrode A camming rib 21 may extendlongitudi- 'nally along surface of thejelectrodell most distant from electrode 20, and theelectrodes maybe suitably insulated from each. other. The grounded electrodes have direct electrical connection with the units 11 and bar 10. That part 22 of the live electrode exposed between the aforesaid bent edges is spaced from the grounded electrode as shown in Fig. 3.

The matter thus far described is substantially the same as that shown in application filed by Payne SerialNo. 350,401. H

In carrying the p'referredform of my invention into efiect I bend the intermediate portion of the electrode or-that part which carries theexposed' surface 22 at right angles to form a connecting arm 31 as suggested in Fig. 4. A horizontal slot 32 is located in the arm as'shown particularly in Fig. 3, and the arm is offset as at 33 and provided with a second horizontal slot 34. The amount of the offset is preferably equal to the thickness of the stock of which the electrode is formed and the purpose of the offset is to permit the bent ends of two adjacent bars to be related as shown in Fig. 2. V 7

An attaching bolt 35 having a nut 36 .will

pass through the open slot 34 of one live electrode and into the slot 32 of the adjacent electrode, and any slight variation in the spacing of the barsfwill be accommodated by the slots. There will be as many bolts 35 as are necessary to electrically connect all of the live electrodes.

A lead-in wire 37 having electric connection with a circuit one end of which is grounded may be connected under any of the bolts 35. The circuit may operate to stop the loom or othermachine to which the warp stop motion is applied or in any other way give indication that a fault has occurred in the warp and will be closed when a drop wire D falls and moves into contact with both electrodes.

By referring to Fig. 3 it will be seen that the arm projects longitudinally from that portion of the live electrode 20 which is farthest from the grounded electrode, so that no additional insulation is necessary other than that ordinarily employed and the likelihood of accidental contact between the electrodes of any bar is reduced to a minimum.

While the arms have been indicated as oifset in Fig. 2, yet alignment of thebars may be obtained by having that portion of the electrode which is generally at right angles to the bar slightly oblique, as shown in the modified form illustrated in Fig. 5. The electrode is made of sufliciently thin material so that the ends may be bent to suit the convenience of the user and afford proper alignment of the various bars.

In assembling the motion, those ends of the contact bars opposite the laterally extending arms will be passed through the slots of the drop wires.

From the foregoing it will be seen that I have provided a simple means for electrically connecting the live electrodes in a warp stop motion by forming them with integral projecting arms adapted for direct engagement with each other. It will also be seen that the live electrodes are so formed that the contacting portions are spaced from the grounded or shielding electrodes 17. Furthermore the bent ends may either be offset or slightly oblique so that they may be connected together in a way to preserve alignment of the bars in a direction substantially parallel to the warp.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to'the details herein disclosed, but what I claim is:

1. In a warp stop motion having a plurality of electric contact bars, each bar having two insulated electrodes each having vertical surfaces which lie in different planes, an extension formed as an integral partof one of the electrodes having a portion thereof bent to have holding engagement with an adja cent electrode, said extension being formed of that part of" the electrode which lies in one only of the vertical planes.

2. In a warp stop motion having an intermediate contact bar between a pair of contact bars each having two insulated electrodes one of which is live and the other of which is grounded, an extension on the live electrode of each bar having a bent portion, the bent portion of the intermediate live electrode having contacting engagement with the live electrode of one of the pair of bars and extending to and contacting with the live electrode of the other of the pair, whereby the intermediate electrode isconnected to each of the pair of bars.

In testimony whereof I have hereunto affixed my signature.

CLARENCE E. BUOTE. 

